--- ncurses-intro.doc.orig	2012-04-26 17:30:21.035610596 +0100
+++ ncurses-intro.doc	2012-04-26 17:30:53.827611686 +0100
@@ -334,6 +334,7 @@
    Here is a sample program to motivate the discussion:
 #include <curses.h>
 #include <signal.h>
+#include <stdlib.h>
 
 static void finish(int sig);